Fig. 3

Differentially expressed PPR transcripts identified in the transcriptomic analysis of A. angustifolia. A Heatmap representing the expression profiles of the 222 PPR transcripts differentially expressed in the GL, GM, AL and AM tissues of A. angustifolia. The four tissues studied are shown at the bottom of the figure, and the transcript identifiers are on the right. Clustering was applied in the heatmap in order to group the transcripts according to their expression levels. The clusters generated are indicated with bars and numbers on the left (1–4). B Number of differentially expressed PPR transcripts in each of the six tissue pair comparisons studied are shown (GL vs GM, GL vs AL, GL vs AM, GM vs AL, GM vs AM and AL vs AM). In each comparison, the first tissue is the reference to indicate whether the genes are up-regulated (indicated by red bars) or down-regulated (indicated by green bars). The numbers within each bar indicate the number of up- or down-regulated transcripts. GL: leaf from green plantlet, GM: meristem from green plantlet, AL: leaf from albino plantlet, AM: meristem from albino plantlet. Up: up-regulated genes, Down: down-regulated genes